NHTSA investigationRQ99008
Investigation RQ99008: 1997–1999 Audi A4
- Status
- CLOSED
- Opened
- Jun 1, 1999
- Closed
- Nov 14, 2000
- Model years
- 1997–1999
Subject
Power brake booster vacuum by-pass
Component: Service brakes, hydraulic
Summary
There is no summary currently available
An NHTSA investigation looks into whether a safety defect exists. Opening one is not a finding. Outcomes can include a recall, closure without action, or further inquiry.
Model years covered
- 1999 Audi A4190 complaints
- 1998 Audi A4258 complaints
- 1997 Audi A498 complaints
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.